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Black rectangular power bank with digital display and four ports

NOBIS N2931 20000mAh 65W power bank

SKU CH-KTS3-MKT53 MPN N2931

A 20000mAh lithium-polymer power bank delivers up to 65W output and 45W input across four ports, recharging fully in 1.5 hours and weighing 400 grams

  • Total capacity20,000 mAh
  • Battery chemistryLithium polymer
  • Voltage5 V
  • Amperage3 A
  • Measurements13.7 in × 7.0 in × 2.63 in
  • Product type20,000 mAh
  • Charges a laptop to 45% in 30 minutes with 65W output
  • Fully recharges the power bank in 1.5 hours via 45W input
  • Powers four devices at once through two USB-A and two USB-C ports
  • Digital display shows remaining capacity and low-current mode protects small accessories
  • Multi-layer safety guards against over-charge, over-discharge, over-voltage, over-current, short-circuit and temperature issues

What it is and who it serves

The NOBIS N2931 is a 20000mAh lithium polymer power bank rated for 65W bidirectional charging. It suits travellers and commuters who need to keep a laptop, phone, tablet and wearables powered through a full day away from wall outlets. It is not for buyers who want more capacity than 20000mAh or who require wireless charging pads.

Sustained load behaviour

The unit delivers up to 65W output and accepts 45W input, recharging fully in 1.5 hours. Under continuous multi-device use across its four ports the internal temperature control manages heat so output remains stable rather than throttling after a short burst. The digital display lets you watch the remaining capacity drop in real time during heavy loads.

Setup checks before ordering

Verify that your devices charge via USB-A or USB-C and that their power draw fits within the bank's 65W total ceiling. Confirm you can carry a 400 gram brick measuring 13.7 by 7.0 by 2.63 inches in your bag. Ensure you have a 45W or higher USB-C charger to replenish the bank at its rated speed.

How it compares

Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.

Price $48.99
Pricier than about 75% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameNOBIS
Model nameN2931
Part numberN2931
Total capacity20,000 mAh
Product type20,000 mAh
Product colorBlack
Power
Battery chemistryLithium polymer
Voltage5 V
Amperage3 A
Size & build
Measurements13.7 in × 7.0 in × 2.63 in
Product weight400 g

Questions about this item

How hot does the N2931 get when delivering 65W continuously?

The unit includes temperature control that actively manages heat during high-output charging, keeping surface temperatures within safe limits for extended sessions.

What cables are needed to reach the 65W output on the N2931?

You need a USB-C cable rated for at least 65W Power Delivery; the power bank provides two USB-C ports and two USB-A ports for simultaneous charging.

Will the N2931 charge an older laptop that only accepts 45W over USB-C?

Yes, the power bank negotiates the laptop's maximum supported rate, so a 45W device will draw 45W while the bank reserves its remaining capacity for other ports.

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